11.4 The noninverting buffer op-amp configuration shownin Fig. Pl 1.4 provides a direct implementation of the feedbackloop of Fig. 11.1. Assuming that the op amp has infiniteinput resistance and zero output resistance, what is /?If A= 1000, what is the closed-loop voltage gain? What is theamount of feedback (in dB)? For Vx = 1 V, find Vo and Vz. If A decreases by 10%, what is the corresponding percentage

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.

Arigid tank contains 10 kg of air at 137 kpa (abs) and 21°c. more air is added to the tank until the pressure and temperature rise to 242 kpa (abs) and 32°c, respectively. determine the amount of air added to the tank. [r-0.287 kj/kg k]